The entropy difference between a liquid and one of the glasses that it samples is called the configurational entropy, S c, and it may provide an important link between dynamic and thermodynamic measures of the fragility of liquids. Most previous estimates of S c have implicitly assumed that all glasses of the same substance have the same entropy, but that assumption can lead to estimates of S c and its temperature dependence that may be wrong by a factor of 2 or more. New estimates of S c for toluene and ethylbenzene are used to test relations between thermodynamic and kinetic measures of fragility implied by Adam and Gibbs theory.
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Robin J. Speedy (2001) studied this question.
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